I'm thinking about hooking up the horn output from the Ungo to the parking light wire on the Z3, via the alarm harness. The reason is because I wanted the parking lights and headlights to flash alternately when the alarm is triggered, instead of just flashing the parking lights. The relay in the Ungo only activates the 1st second of the built-in relay on the Z3, that's why it only flashes the parking lights. The way to do it is to set the horn output to "constant", and connect that to the light-flash of the harness on the Z3. Has anyone tried this yet? Or is there a why to hack the relay on the Ungo unit so it has constant output instead of pulsed?